/Engine/Plugins/Online/OnlineServicesEOS/Source/Public/Online/ExternalUIEOS.h
IExternalUI.
virtual [TOnlineAsyncOpHandle](API\Plugins\OnlineServicesInterface\Online\TOnlineAsyncOpHandle)< [FExternalUIShowLoginUI](API\Plugins\OnlineServicesInterface\Online\FExternalUIShowLoginUI) > ShowLoginUI ( [FExternalUIShowLoginUI::Params](API\Plugins\OnlineServicesInterface\Online\FExternalUIShowLoginUI\Params) && Params )